/** * 数字格式转换成千分位 *@param{Object}num */function commafy(num){   if((num+"").Trim()==""){      return"";   }   if(isNaN(num)){      return"";   }   num = num+"";   if(/^.*\..*$/.test(num)){      varpointIndex =num.lastIndexOf(".");      varintPart = num.substring(0,pointIndex);      varpointPart =num.substring(pointIndex+1,num.length);      intPart = intPart +"";       var re =/(-?\d+)(\d{3})/       while(re.test(intPart)){          intPart =intPart.replace(re,"$1,$2")       }      num = intPart+"."+pointPart;   }else{      num = num +"";       var re =/(-?\d+)(\d{3})/       while(re.test(num)){          num =num.replace(re,"$1,$2")       }   }    return num;}/** * 去除千分位 *@param{Object}num */function delcommafy(num){   if((num+"").Trim()==""){      return"";   }   num=num.replace(/,/gi,'');   returnnum;}